lasier



' D. R-. LASIERI Dec 15, 1931 I FUSIBLE TYPE HOLD-OPEN ARM R 18,284

i 2 Sheets-Sheet 1 Original Filed March 5, 1929 D. R. LAS IER D 15 FUSIBLE TYPE HOLD-OPEN ARM 2 Shets-Sheet 2 Original Filed March 5, 1929 Reissued Dec. 15, 1931 PATENT OFFICE DAVID BI. IJASIER, OF CHICAGQILLINOIS, ASSIGNOR TO NORTON-LASIER COMPANY, OF

CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS FUSIBLE TYPE noLn OPEN ARM Original No. 1,812,408, dated June 30, 1931, Serial No. 344,213, filed March 5, 1929. Application for reissue filed September 3, 1931.

This invention relates to holding devices of the type usually applied to doors, windows and similar closure means, for holding the door, window or similar means in a predetermined open position, and to holding devices which are affected under conditions of temperature above, by a predetermined amount, the highest atmospheric temperature to which the device will be exposed, to render the holding means ineffective whereby the closure means held open by the device will be free to swing or move to its closed position, in the event of accidental occurrence of tire.

An object of this invention is to provide a novel device adapted tobe operatively connected between a stationary part and the closure means such as for instance, between the door sill and door, and operative to automatically hold the closure means in any desired predetermined open position when the closure means is moved and urged into said position, and to release the closure means when the device is exposed to a predetermined temperature.

Another obiect of this invention is to provide a novel form of holding means, which is simple in operation and construction and highly efiicient in service and one in which the release is accomplished without disturb- 0 ing the holding parts.

Another object is to provide anovel holding device equipped with temperature responsive means, such as a fusible link for controlling the releasing mechanism, whereby exposure to a predetermined temperature will cause the release, and consequent closing of the closure means.

In the illustrated form of this invention, the holding device is disclosed as a pair of pivoted links or arms, having holding friction facesof substantially the construction shown in applicants co-pending application, Serial No. 190,427, filed May 11th, 1927, for improvements in door holding arms but it is Serial N0. 561,059.

to be understood that the holding mechanism may be located at any one of the pivots, that is to say, either at the pivot between the links as shown, at thepivot between one of the links and the door sill or at the pivot between the other link and the door.

It is obvious that for its successful operation, the holding device requires merely a relative movement between co-operating parts, the relative movement between which is caused by the opening and closing of the door, and therefore, as this condition exists atany one of the pivots, any one of these locations will serve. In fact, certain of these locations have advantages over certain of the other locations, under particular circumstances, such as the number of-degrees of swing of the door, location at which holding is desired and the use or nonuse of door closing and checking devices with the holding device, etc., and accordingly the invention is not to be limited by the disclosure in this particular, as all of the various locations are contemplated for the holding mechanism.

Also the particular type of holding mechanism may vary within limits as this invention relates to the combination of a suitable holding mechanism and releasing mechanism for rendering the holding mechanism inoperative, and consequently any suitable holding mechanism may be employed. 1

It is to be further understood that the releasing mechanism is to be located in close proximity to the pivot at which the holding means is located so as to serve as a substitute pivot therefor in the event the releasing mechanism is brought into operation.- Furthermore, that the device contemplated be used either with or without door closing and checking devices.

Various objects not specifically enumerated and in addition to those above mentioned, will readily appear to anyone skilled in the art to which this invention pertains, as the following description proceeds.

The disclosure is to be considered merely as oneembodiment of this invention which is given only by way of example and the scope of the invention is to be determined from a complete understanding of this disclosure, and an appreciation of the advantages which the invention produces in this illustrative form. Y I

The invention will be more readily understood referring to the accompanying drawings iri\whic'h-v Figure 1 is a perspective view ofia hold},

ing device construct-ed in accordance with this III'VGHtI'OIl";

Figure 2 is a plan'view of the construction shown in Figure 1, with the parts thereof in.

displaced positions to better show their con struotion. and operation-.-

Figures 3, 4 and 5 are enlarged perspective views of parts of the device shown in Figure L disclosingg the constructiongandarr-ange inent; and Figure 6" is an enlarged view of the-fusible linkemployed' in Figure 1.

' By-referrin g to the drawings; it will noted that my inventipn is illustrated as 'ap-I plied to a door-holding device comprising a pairof'li'nl'ts'm' and 11 which with theexeeption-cof the improvements contemplated "in tHisinventi-om are simil'ar in eonstruction to the' lroldiiig device disclosed in the applicants co pendingjapplieat-i'onabove referred to and which-are adapted be mounted in the man-' ner disclosed"therein? 2 i p The pa-rts'which are notessential' to a complete understanding of this invention have been omitted from th'e drawings and description as they are disclosed as constructed and mounted inthe manner shown in the co-pen-d' iiig application where" the construction and mounting are completely shown detail.

Abcordingly the link is provided with a *head 512"havingfari'opening 13 adapted to be connectedito adoorcheck; The liig' l lis' provided for" connecting. thearm witli"' tl1e ddorcheckiin' the' usual manner-.1 At theoppositeend of the arm 10', a head 15 islprovided; betterlshown inuFigure having the center pivot "opening; 16 and the spiral friction face'l'lf Pivoted .to and" cooperating. with the en'dioffthearm"1.0; is the element'- 18, shown in" Figures 3 and "4,-'havu'ng the. threaded open1ng19 and spiral face 20. a The friction: face 201's adapted ,tocooperate with the fricti'on'face 17 whereby upon relative os cill'ation of these two parts the-outer surfaces of the .head 15 and the element 18 willlsepw arate and iap'proach'each other.

' Positioned through the pivot opening 16 is the .bolt .21 provided with the threaded end 22Iadapted for threaded. engagement with the opeai1ig19'in the element 18. The bolt is of such'leng'ththat the end thereof will project above the element 18 when the parts are in operative position so as to receive the lock nut 23 on the end thereof.

Positioned between the head 24 of the bolt and the outside face of the head 15, is the washer 25. It will be appreciated that when the bolt is positioned through the head 15 and the element 18 so as to form a pivot bearing therefor, that angular movement of the element 18 relative to the head 15, in one directionmin cause a binding of-the pants due to the fact'zth'at; according to the particular adjustment of the bolt, only a limited clearance isprovided for the expansion movement. In this manner "by 'properly adjusting" the bolt, so as to provide apredetermined clearance,..the element 18 and head 15 can be broughti'nto a binding engagement at any door siliand the head 15-carried onsthesarm l0 is: pivotally connected to 1 the other Ofa said parts-and:- the bolt is adjusted to. produce the binding; of the friction faces: in that position of the; head -15 and:element;1& at which it is desired to. hold the; door;

. Exceptdnsofarias the element 18 being 2 independent part pivotally connected" tOutllE armll, irstead-. on. being,- ri'gid' therewith, the operatienand-construction of'the device above given'ais substantially; like that of the .co pending application above referred t-o The; element- .18 is .-.pro.vided-. with: a pivot lug 26; havingthe pivot opening. 27 and in addition, aylocking ing 28. Pivotally con nectedby'means .of a pin=29-,- to the pivotlug 26, isthe element Th-iselementis pro-. vided' witha: straight. faced portion- 31', adaptedtoabut the surface 32 ofthe locking lug-28-on the firstelement as to prevent pivotal movement betweenttheseparts inone direction; The'iele'ment *30 cooperates with the pivotpin 29 by means of the pivot open-- ing;-33.- I Theelement 30 is providedflon-one side,' with the'pivot 11125334 having the opening Pia-for pivotally receiving-the locking dog 36, secured thereto by meanstofathe'pivot,bearings 37 and pivot: pin.38.:

The lockingrdog is provided-.witha shoal-.1

, endsadapted to fit over-and engage the nose 40 of thelocking. dogg36; Thexlength'oii the fusible .linkeis such. thatthe-link holdsthe. locking dogin intimate engagement with the locking: lug, .28 in. the, manner .shown inFig: ure 1." The various part-s are soponstructed thatwhen, the locking dog is in-engagement;

I broadly and as covering all with the lug 28 as shown in Figure 1, the flat face portion 31 of the element 30 is in close contact with the face 32 on the lug 28. Consequently when the parts are in assembled position as shown in Figure 1, the element 18 is held rigidly to the element '30 whereby in efiect these parts are a single rigid member.

The element 30 is in addition provided with a pivot lug 46, having a pivot opening 47 adapted to receive by means of the pivot pin 48, the portion 49 of the link 11. Portion 49 is provided with an opening 50 and looking screw 51 adapted to adiustably receive a rod constructed at its opposite end for abutment to either the door or the door sill as the case may be. This part is not shown as it is of the same construction as that shown in the applicants co-pending application.

In operation, the holding device is mounted in the customary manner with the parts arranged as shown in Figure 1 whereby the elements 18 and will be rigidly held together in a manner to cause these parts to function as a unitary arm or link. In this event, the holding device comprising the cooperating friction faces functions in the manner of the device in the co-pending application, acting to hold the door in any predetermined open position according to the particular adjustment of the pivot bolt 21.

In the event of fire. such that the fusible link 43 will be fused, the portions of the link will. become separated leaving the locking dog: 39 free to disengage the lug 28. Under such circumstances, even though the friction faces are firmly bound, in a manner to hold the door. the independent pivot pro-- vided on the pin 29 acts as a substitute pivot and permits the arms to be pivoted relative to each other whereby the door is free to swing shut.

If the device is used incombination with a door closing mechanism, whether of the checking type or any other type, this mechanism will urge the door shut in the desired manner. It is of course understood that de vices of this kind are employed. because in the event of fire. it is desirable to shut off from other portions of the building, that portion which is affected by the fire.

The fusible link 43 is not described in detail because no claim is made to the link per se except as a part of the combination herein defined, and the fusible link construction here disclosed is old and well known.

It is obvious that the invention has application on all sorts of closures such as floors, windows, and the like and that the device when installed, is connected to the closure such as a door at one end and to a stationary part, such as the sill at its other end and accordingly, the invention is to be construed such installations. 1 However, for the purpose of clarity, the applicant-hasdefined his device-as connectedbetween a doorand door sil l but these terms are to be considered as covering any similar means. m 1 T' The scope of the inventionwill be readily determined by referring to the appended claims I claim:

1. A holding device adapted to be pivotally connected between a door and door sill respectively, comprising in combination, a link having a friction face at one end, an element having a cooperating friction face pivotally connected to the end of said link, a second element pivoted to said first element, on an axis parallel with the pivotal axis between said link and first element, a lug on said first element, .a dog pivoted to said second element, adapted for locking engagement with said lug, and a fusible link for holding said dog in engagement with said lug.

2. A holding device adapted to be pivotal ly connected between a door and door sill respectively, comprising in combination, a link having a friction face at one end, an element having a cooperating friction. face pivotally connected to the end of said link, a second element pivoted to said first element. on an axis parallel with the pivotal axis between said link and first element, a

his: on said first element, a dog pivoted to said second element. adapted for locking engagement with said lug. and a fusible link secured to said first element and engaging the end of said dog.

3. A holding device adapted to be pivotally connected between a door and door sill. res ectively. com rising in combination a link hav ng a friction face at one end. an element having a cooperating frictionv face pivot-allv connected to said link. a second element pivoted to said first element, on an axis parallel with the pivotal axis between said link and first element. means for holding the pivot between said first and second elements normally inactive, comprising a holding mem ber pivotally mounted on one of said elements and extending to and having holding engagement with the other of said elements, and a fusible link for normally maintaining said member in holding relationship.

4. A holding device adapted to be pivotally connected between a door and door sill respectively, comprising in combination, a link having a friction face at one end, .an element having a cooperating friction face pivotally connected to the end of said link, a second element pivoted to said first element on an axis parallel with the pivotal axis between said link and first element, a dog pivoted to one of said elements having a portion 

